Ventilator.



l. SYL'VAN.

VENTILATOR.

APPLICATION FILED FEa.24,1919.

Patented Apr. 22,1919.

j?? UeyZZLOl STATS? i 1 JOSEPH SYLVAN, F CHICAGQILLINOIS.

VENTILATOR.

specification of Letters Patent Patented A151222, 1919.'

Application :tiled February 24, 1919. Serial N o. 278,786.

ence being had to the accompanying drawings, andto the letters of reference marked thereon, which cation. i

This invention relates to improvements in ventilators for roofs, `skylights and the like and consists of the matters hereinafterdescribed and more particularly pointed out in the appended claims.

hel object of the invention is to provide a ventilator of the kind described, which is' simple in construction and is efficient in operation for its intended purpose.

The advantages of the invention will appear as I proceed with my specification.

In the drawings: nFigure `1 represents a view inside elevati'on of a ventilatorl embodyingV my invention.'

Fig. 2frepresen'ts a view in front end elevation ofthe same.'

form* apart of this specifi- FigiB represents a vertical'section through thventilator, the planeofthe section being indicated by the line 3-3 of Fig. 2.

Fig. l4 represents a view in rear end ele` vation of the ventilator embodying my invention;

Fig.`5 represents, onan enlarged scale, a view partly in plan elevation horizontal section, partt being indicated by the line `5-5 of `F1g."3.

Referring now in detail to that embodih ment of the invention illustrated inthe accompanying drawings :-y indicates the upright, tubular sheet metal rstem or base 'of the'ventilator, which is attached in any suitable manner to aroof or'skylight, .and 11 indicates asa whole, the ,sheet metal top ofthe ventilator which is rotatably mounted on-andsurrounds the top part of the stem 10. `The to 11` comprises a head 12 and a hood 13;; The headl 12 includesa front, wind deecting plate 14 and a Y Thefront plate 14 is transversely rounded at its middle, 'concentric with the stem and `its opposite'sidesA are bent `or flared outthat I, JosEPH SYLvAN,sa.

new and use- 1 and partly in the planeof the sectional` plane of thef mouth 22 of said rear wing plate 15.

a short distance to the nates at the top edges of 16.V `The wing plate l5 of the head 12 is of a width approximating the diameter of the stem 1 0. The middle part 18 of said wing from the top edge of thefront` plate 14, while the sides 19 of said wing plate diverge forwardly and outwardly from said middle part to terminate in upright, laterally extending flanges 20. Said flanges are arranged in the `plane of, but are spaced inwardly from, the edges of the gins 16, in connection with which are defined rearwardlyfacing,.spaced side openings 2l, 21, one at each side of the wing plate 15. The bottom endsof said openings are closed by horizontal floor plates 21a.A `The bottom edges of the middle part 18 and of the sides 19 of the wing plate 17, defnea mouth 22l `which communicates with the top end ofthe stem 10. l

The hood 18 consists of a sheet metal plate bent'into a. form somewhat like that of the wing plate before referred to. The midle` part 23 of said hood-is arranged ina plane spaced from, but parallel with the middle part 18 of the wing plate 15, and the side parts 24 thereof are spaced from, but are' parallel with the side parts 19 of said wing plates. The front edges parts 24` are attached to the upright flanges of the 4wing plates 15,

' channel 'or conduit 25 bewing he upper end v2b of of the hood .hood `13, so as tov denne 1n connection with said top end 17 an `inlet mouth 28 which rounded marof said side, dges of the l the said middle partA opens into. the channel or conduit 25 (see Fig. 3). On the verticalmedian line ofthe hood 13 at its top is secureda vane`29. l

Preferably the head 1:1 is rotatably mount- .3) and set up an ed on the stem 10, so that when wind pressure is exerted against the vane'29, the head will turn to present the inlet mouth 28 of the hood, forwardly or toward the direction from which the wind is blowing, while the side mouths 21 will open rearwardly or in the direction toward which the wind is blowing. I rotatably att-ach the head 11 to the stem 10, as follows:

To the inner surface of the bottom edge of the front plate 14 is secured a spider ring 30 having radial arms, the ring surrounding the top end of the stem 10. Vertically above saidring is attached a second spider arm member 31 and within the stem 10 are top and bottom spider rings 32' and 33, also having radial arms. A bolt or pivot pin 34k passes through the center of the spider arms, so as to hold the top 11 on the stem 10, and between the arms of the rings 30 and 32 is provided an antifriction bearing 35 (see Fig. 3).

rIhe operation of the improved ventilator is as follows :#Assume that the wind is blowing and has engaged the vane 29 to rotate the top 11 on the stem 10 so as to present the mouth 28 to the wind. Such wind as enters the mouth 28 will pass down through the channel or conduit 25 (as shown in Fig. aspirating action in the vicinity of the mouth 22 to establish a suc` tion action above the top end of the stem 10 at its center. Such wind as impinges against the rounded middle part of the front plate 14; will be deliected laterally by the sides of said plate so that as it passes ed margins 16 of the said plate 14, it will produce an aspirating action in the rearwardly facing side mouths 21 and establish a suction above the top end of the stein 10 at its sides (as shown in Fig. 5). The combined area of the side openings'21 approximates the area of the stem, and thus the suction produced by said mouths when con-l sidered in connection with the suction exerted through the bottom mouth 22, insures ample ventilation in the room of the building, to the roof or skylight of which the Vventilator is attached.

Should the wind shift to a direction at right angles to that in which it was originally blowing, it will, through the vane, rotate the head 11 to present the mouth openings in the proper direction, and thus no air will enter the mouths 21, and 22 and produce a down draft in the ventilator. Furthermore, no snow or rain can enter the stem 10 by reason of the construction before described. Should snow or rain enter the mouth 28, it will be discharged through the bottom end of the channel or conduit 25 without the ventilator. The parts are easy to make and when assembled provide a balanced construction which will rotate about Vthe pivot bolt 34 without binding. The venthe roundl tilator readily withstands high wind pres'- sure because the parts are so arranged as to brace one another.

While in describing the invention, l have referred to certain details of mechanical construction and arrangement of parts, I do not wish to be limited thereto, be pointed out in the appended I claim as my invention: 1. A ventilator for roofs, the like, comprising an claims.

skylights and except as may upright, tubular f stein, a top mounted on said stem and consisting of a head and a hood, the head being formed to l provide laterally spaced, vrearwardly facing, upright side openings and a sok rearwardly and downwardly facing mouth between said side openings, all of which communicate directly with said stem, and said hood providing a conduit having an inlet opening forwardly above the head and an outlet opening at the bottom of said head.

2. A ventilator stem, a top mounted on said stem and consisting of a head and a hood, the head being formed to provide laterally spaced, rear-A.

like, comprising an uprig and a top rotatively mounted thereon, said top consisting of a head and ahood, the head being formed to provide laterally spaced, rearwardly facing, upright Vside openings ead.

3. A ventilator for roofs, skylights and the?V ht, tubular 'stemf for roofs, skylights and y Vthe like, comprising an upright, tubular and a rearwardly and downwardly facing mouth between saidside openings, all of which communicate directlywitlisaid stem, and said hood providing a conduit having an inlet opening forwardly above the head and an outlet opening at the bottom of said .head i 4.-. A ventilator for roofs, skylights and an upright, tubular the like, comprising stem and a top rotatively mounted thereon,

said top consisting of a head and a hood, thelaterally,` upright side head being formed l to providespaced, rearwardly facing, openings and a rearwardly and downwardly facing nrouth between said side openings, all

of which communicate directly with-saidstem, and said head providing a channel about the sides forwardly above the and rear ofsaid head which has an inlet opening head and an outlet opening at the bottom of said head.

5.. VA ventilator for roofs, skylights the like, comprising an uprightg tubular stem and a top rotatively mounted thereon,

l upright front wardly facing mouth 'said top including a head and a hood, the head consisting of a rearwing plate and an rounded middle part, a rounded top part and outwardly and rearwardly extending side parts, said wing plate deiining a downwhich opens into the stem and the side margins of said wing plate together with the side margins of said front` plate, defining upright, laterally spaced, rearwardly facing side openings which also open into the stem, said hood providing a channel about said wing plate between said side openings, which channel has an air inlet mouth above the rounded top part of the head and a discharge mouth arranged in the plane of the bottom mouth of said head.

6. A ventilator for roofs, skylights and the like, comprising an upright, tubular stem and a top rotatively mounted thereon, said top including a head and a hood, the head consisting of a rear wing plate and an upright front plate having a transversely a rounded top part and rearwardly extending side parts, said wing plate deining a downwardlyfacing mouth which opens into the stem and theside margins of said wing plates together with the side margins of said front plate, defining upright, laterally rounded middle part, and outwardly 

